Including huge string in our c++ programs?

I am trying to include huge string in my c++ programs, Its size is 20598617 characters , I am using #define to achieve it. I have a header file which contains this statement

#define "<huge string containing 20598617 characterd>"

When I try to compile the program I get error as fatal error C1060: compiler is out of heap space

I tried following command line options with no success

/Zm200
/Zm1000
/Zm2000

How can I make successful compilation of this program?

Platform: Windows 7